B2 6.1 The origins of life on Earth

HideShow resource information
  • It is believed that the Earth is about 4500 million years old and that life began about 3500 years ago.
  • There is some debate as to whether the first life developed due to the conditions on Earth, or whether simple life forms arrived from another planet.
  • We can date rocks. Fossils are found in rocks, so we can date when different organisms existed.
  • Fossils may be formed in various ways:
    • from hard parts of…


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Evolution, extinction and natural selection resources »